Rotatable machine board



S M CHILD ROTATABLE MACHINE BOARD.

APPLICATIQNFILED SEPT. 1-2.:921. 1,401,960.

Patented Jan. 3,19 2 2.

STANTON M. CHILD, OF NEW YORK, N. Y.

ROTATABLE MACHINE BOARD.

onaco.

Application filed September 12, 1921.

T all whom it may concern Be it known that I, STANTON M. CHILD, a

citizen of the United States, and a resident of New York, in the countyof New York and State of New York, have made an invention appertainingto Rotatable Machine Boards; and I do hereby declare the following to bea full, clear, and exact'description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to thecharacters of reference marked thereon, which form a part of thisspecification.

My invention has for its object to provide a rotatable supporting boardfor supporting relatively heavy machines, particularly office machines,in order that the machines may be operated from the different positionsrelative to surrounding objects, such as tables, book or card supportingdevices, and other office furniture, that will not vibrate or wobble inthe operation of the machine, and wherein provision is made for securingthe machine and the board in the position to which it may be turned. Theinvention particularly has for its object to provide in connection withsuch a rotatable board a structural arrangement that can be readilyformed at a low cost of production and yet will be sufficiently rigid tofully withstand the use to which such a structure will be subjected. V

The invention may be contained in structures that vary in details andthat will come within the scope of the invention, as set forth in thecombinations of elements found in the claims appended hereto. Thestructure containing the invention is illustrated in the accompanyingdrawings and is described hereinafter.

Figure 1 of the drawings illustrates a bottom view of the rotatableboard. Fig. 2 is a sectional view taken on the line 22 indicated inFig.- 1.

1, in the figures, is the board that may be formed of any suitablematerial, such as wood, on which a machine, such as a typewriter, anadding machine, or other similar machine, may be located.- If desired,the machine may be secured by suitable fastening members, well known inthe art, to the board. To the under side of the board is attached acircular flanged member 2. The flanged member 2 may be formed of anL- VSpecification of Letters Patent.

Patented Jan. 3, 1922.

Serial No. 500,121.

iron bent circularly or it may be formed of EL StIIp of metal that isturned inwardly by die-pressing, or other method, leaving the flange orskirt 8 extending downward from the under surface of the board 1. A pairof cross-bars 4; are secured to the flanged memher 2 by means of thebolts and nuts 5. The cross-bars 4 may be L-bars and the webs of the Lbars may be secured to the table top by the screws 6 whereby the flangedmember 2, as well as the cross-bars 4:, will be securely attached to theboard 1. A pair of brace members 7 are secured by suitable means, suchas the rivets 8, to the flanges of the cross-bars 4. The brace members 7extend towards each other and are riveted together by the rivets 9, theendsof the brace members 7 where they connect with one or the other ofthe cross-bars t being located some distance apart and being rivetedtogether at the central portion which forms an eflicient bracing meansbetween the central portions of the brace members and the board 1.. Eachof the brace members 7 at the central portion thereof is bentsemi-circularly so that when the brace members are riveted together theyform a substantially cylindrical shaped opening 10 between the bracemembers leaving small wedge-shaped spaces 11 that areonecessarily formedin the bending of the brace members ,7. The brace I members 7 arelocated at ashort distance from the under side ofthe board 1 andatubular member 12 is located in the circular opening 10. The tubularmember 12 forms a stem or bearing member of large cross-sec tlonal areaand consequently of large contact or supporting area. The board 1 andthe parts attached thereto are rotatively supported by the tubularmember 12. The

tubular member 12 is'secured in position by means of a cotter in 13 thatextends through the tubular mem er 12 and so as to hold the other end ofthe tubular member 12 against the lower side of the board 1. The ends ofthe'cotter pin 13 rest upon a washer 14 located on the brace member 7.

A pair of members 15 are bent to form horizontally extending bars andare secured together at their central portions by the rivets 16. Theends of the substantially radially extending bars are provided withcushioned feet 17. The central portions ofthe members '15 are also bentsemi-circularly so that when the said members are secured together bythe rivets 16 they form the cylindrically shaped opening 18 having adiame ter slightly greater than the tubular member 12 and so that thetubular member 12 may be inserted in the opening 18, the surfaces of thecentral portions of the members 15 forming a large bearing area forholding the board 1 in position and yet enabling rotaformed integralwith the washers 20 by bending the central portion of the metal fromwhich the washers are formed in a direction at right angles to thesurface of the metal. The lugs 22 are inserted in the wedge-shapedspaces 11 and 19 so as to prevent rotation of the washers when the board1 is rotated. This causes the washers 20 to frictionallyengage the fiberwasher 21 and thusfrictionally resist rotation of the table 1, to asmall degree. i

One of the substantially radially extending bars formed from the members'15 is provided with a U-bar 23 that is pivotally secured by means ofthe screw 24.- to the bar on which it is located. The sides of the U-bar extend on opposite sides of the supporting bar whereby the U-bar isguided in its pivotal movements. A spring 25 is located within the U-barand between the upper edge of the supporting bar and the back of theU-bar. It is secured to the U-b'ar by a pair of pin-points 26. It is soshaped as to press against the upper edge of the supporting bar to causethe U-bar to be raised. The back of the U-bar extends outward to form asubstantially radially extending strip 27. The flange 3 of the flangedmember 2 is provided with a plurality of notches 28 that may registerwith the strips 27 so that the flanged member 2 may be engaged by theU-bar at any one ofthe notches 28. The outer end of the strip 27 may beprovided with a finger-piece 29 whereby the U-bar may be convenientlydepressed. The table 1 may thus be rotated to any desired positiontogether with machine supported thereon when the U-bar is depressed. TheU-bar may then be released and ifit'doesnot enter a notch 28 the table,together with the machine, may be rotated a short distance so as topermit one of the nearer notches to register with the U-bar 23 and beengaged thereby.

for interconnectingthe parts, such as screws,

Any suitable means or devices may be used rivets,;andsome of the parts,if desired, may be welded together, in the manner well known in the art.i

I have thus provided by my invention an and eflicient rotatable supporthaving a low altitude that is durable and has large bearing areas thatwill prevent vibration, which is eXceedinglyvalua-ble particularly whenused for supporting finger operated oflice machines.

I claim 1. In a rotatable supporting board for adding machines or thelike, a board, a flanged circular member secured to the board and havingL. cross-bars interconnecting portions of theflange and extendingapproximately across the circle of the flange, brace membersinterconnecting the L members and secured to each other, the bracemembers forming a cylindrically shaped opening, a tubular memberextending through the said opening, a pair of members secured togetherand forming a cylindrical shaped opening and having L cross-barsinterconnecting portions of the flange and extending approximatelyacross the circle of the flange, brace menrbers interconnecting the Lmembers and secured to each other, the. brace members forming acylindrically shaped opening, a tubular member extending through theSilltl opening, a pair of members having a cylindrical opening betweenthe said last named members for receiving the tubular member and bent toform bars extending substantially radially from the saidtubular member,cushioned feet connectedlto ends of the said bars, thecircular flangedmember being provided wlth a plurality of notches, a

spring-pressed arm having a finger-piece and pivotally supported on oneof the bars,

said arm being elastically movedto engage the notches of the saidcircularly flanged member.

8; In a rotatable supporting board for adding machines or the'like, aboard, a flanged circular member secured to the board and having Lcross-bars interconnecting portions of the flange and extendingapproximately across the circle of the flange, brace membersinterconnecting the L-members and secured to each other, the brace.members forming a cylindrically shaped opening, a

tubular member extending through the said opening, a pair of memberssecured together forming a cylindrical shaped opening between the saidlast named members for receiving the tubular memberand bent to "formbars extending substantially radially from the said tubular member,cushioned feet. connected to ends of the said bars, a U-bar' 'pivotallyconnected to one Of the last named bars, the sides of the U beinglocated on each side of the said last named bar, a spring located withinthe sides of the U-bar and operating to press against the top edge ofthe said last named bar and secured by punch points within the top ofthe U-bar, the spring operating to raise the outer end of the U-baragainst the flange of the circular flanged member, the back portion ofthe U-bar extending beyond the sides of the U to form a strip extendingfrom the U-bar, a fingerpiece located on the end of the said strip, thecircular flanged menrber having notches for receiving the said strip toprevent rotation of the board.

4-. In a rotatable supporting board for adding machines or the like, aboard, a flanged circular member secured to the board and having Lcross-bars interconnecting portions of the flange and extendingapproximately across the circle of the flange, brace membersinterconnecting the L-niembers and secured to each other, the bracemembers forming a cylindrically shaped opening, a tubular memberextending through the said opening, a pair of members secured togetherand forming a cylindrical shaped opening between the said last namedmembers for receiving the tubular member and bent to form bars extendingsubstantially radially from the said tubular member, cushioned feetconnected to ends of the said bars, a pair of metal washers locatedbetween the braces and the bar forming members and having lugs, one ofthe lugs located between the braces and the other lug located betweenthe bar forming members to prevent rotation of the washers relative tothe braces on the one hand and the bar forming members on the other,fiber washer located between the metal washers.

5. In a rotatable supporting board for adding machines or the like, aboard, a

flanged circular member secured to the board and having L cross-barsinterconnecting p01- tions of the flange and extending approximatelyacross the circle of the flange, brace mem bers interconnecting theL-members and secured to each other, the brace members forming acylindrically shaped opening, a tubular member extending through thesaid opening, a pair of members secured together and forming acylindrical shaped opening between the said last named members forreceiving the tubular member and bent to form bars extendingsubstantially radially from the said tubular member, cushioned feetconnected to ends of the said bars, a U-bar pivotallyconnected to one ofthe last named bars, the sides of the U being located on each side ofthe said last named bar, a spring located within the sides of the U-barand operating to press against the top edge of the saidlast named barand secured by punch points within the top of the U-bar, the springoperating to raise the outer end of the U-bar against the flange of thecircular flanged member, the back portion of the U-bar extending beyondthe sides of the U to form a strip extending from the U-bar, afinger-piece located on the end of the said strip, the circular flangedmember having notches for receiving the said strip to prevent rotationof the board, a pair of metal washers located between the braces and thebar forming members and having lugs, one 7

